Fluid pressure operated valve



p 1947,. A. L; PARKER 2,426,900 FLUID PRESSURE OPERATED VALVE Filed may 15, 1945 INVENTOR.

aw a mm 4 R dm m m F Jr LE Patented Sept. 2, 1941 FLUID PRESSURE OPERATED VALVE Arthur L. Parker, deceased, lateo! Cleveland, Ohio, by Helen M. Parker, execntrix, Shaker Heights, Ohio, minor to The Parker Appliof o anchglompany, Cleveland, 01110, a corporation Application May 15, 1945, Serial No. 593.795

The invention relates to new and useful improvements in a fluid pressure operated valve, which while capable of general use is more particularly adapted for operation-in connection with a control pilot valve.

An object of the invention is to provide a valve assembly wherein the main valve is operated by fluid pressure controlled by a pilot valve so that when said pilot valve is in closed position the fluid pressure-operating on the'main valve will close the same, and when the pilot valve is in open position the fluid pressure operating on the main valve will open the same.

A further object of the invention is to provide a valve casing having an adapter so constructed as to close one end of the casing and divide the same into inner and outer chambers which are concentrically disposed and wherein communication between the chambers is through ports disposed between spaced annular valve.

seats at the inner end of the adapter and wherein said ports are closed by a valve mounted for free movement in said casing and adapted to make sealing contact with both seats.

A further object of the invention is to provide a valve assembly of the above type, wherein the casing and the valve are so constructed that the valve 'is moved by difierential fluid pressure upon opposite sides thereof.

A still further object of the invention lsto provide a fluid pressure operated valve of the above type wherein the difierential in the pressures is controlled by a pilot valve.

These and other objects will in part be obvious and will in part be hereinafter more fully disclosed. I

In the drawing:

Figure 1 is a view showing more or less divalve assembly embodying the improvements, the

1 Claims. (01. 137-139) adjacent the end of the casing. Ring sealing gaskets 5, 5 disposed in suitable annular recesses .in the adapter make sealing contact with the ber 9 which surrounds the adapter.

The inner end of the adapter is provided with an annular channel l0 and at spaced intervals there are ports II which connect the annular channel ill with the chamber 9.

The inner end of the adapter is provided with an annular valve seat It and an annular valve seat B. These valve seats are spaced from each other by the channel ill.- The valve seats lie in the same plane which in the illustrated embodiment of the invention is at right angles to the that it is free to slide lengthwiseof the casing.

- agrammatically and in longitudinal section a valve being unseated so as to provide a free fluid communication between" the inlet and foutlet openings of the valve assembly.

Figure 2 is a view similar to Figure l, but showing the valve closed.

Figure 3 is a sectional view on the line 3-3 of Figure 1.

The valve assembly embodying the improvements includes a cylindrical valve casing I having an opening 2 in the side wall thereof, which is surroiinded by a boss 3 to which an adapter may be connected.

' Disposed within the cylindrical casing 'l is an adapter ,4. This adapter is so dimensioned as to contact with the inner wall of the casing There are nogaskets between the valve and the inner wall oi the casing. so that the valve will slide freely in the casing. The valve is provided on its inner face with an annular recess ll in v which is disposed agasket l8 that projects from the inner face of the valve and is so positioned that when the valve is closed, the gasket will engage the valve seat l2. Also disposed in the valve is a second annular recess l9 containing a gasket 20 which is adapted to engage the valve seat l3. These annular gaskets are preferably made of rubber and they are held in the valve by several radial drills Zia, one of which is shown in Figure 2. The rubber .flows into the radial passages connecting the 3, side of the valve and tion between the valve chamber at the outer side of the valve and the fluid passage 1 through the adapter. When the valve is in open position, ae'shown in Figure 1, this passage forms aforming a fluid conneccommunication between the valve chamber at the outer side of the valve and the valve chamber at the inner side of the valve. The valve chamber at the inner side of the valve, when the valve is open, also provides communication between the inlet passage 1. and the cylindrical chamber 9, and from the cylindrical chamber to the outlet through the opening 2 in the side wall of the casing. When the valve is moved to closed position so that the rubber gaskets contact with the valve seats, then the ports are closed. At this time, however, the passage 2l' through the valve is open so that the chamber at the outer side of the valve is in communication with the passage I through the adapter.

A coiled spring 22' is disposed between the valve and the head 15, and tends to move the' with a gasket 28 whichengages the inner wall of the chamber 24 so as to close the opening 23. When the pilot valve is moved to the left to the position shown in Figure 2, when the passage 23 is closed, and connection between thevalve chamber at the outer side of the valve and the outlet is out off. When the pilot valve is moved to open position as shown in Figure 1, then the chamber at the outer side of the valve is connected with the outlet.- This pilot. valve maybe spring closed as shown in the Parker Patents 2,351,871 and 2,351,873 grantedJune 20, 1944. The pilot valve may be controlled manually or by any suitable means. As far as the present invention is concerned, the means for moving the pilot valve is immaterial.

As shown in Figure 2, the pilot valve is closed and the main valve is also closed. The fluid pressure in the valve chamber on the outer side of the valve is the same as-the fluid pressure on the inner side of thefvalve. Thearea indicated at A is subjected to the fluid :pressure on the outer side of the valve and the area indicated by B is subjected to the fluid pressure on the inner side of the valve. It will be noted, therefore, that thereis a differential in the fluid pressures operating upon the valve, and that the fluid pressure operating upon the outer side of the valve is much greater.

This,'together with the force exerted by the spring, moves the valve to closed position and holds it firmly seated. The two seals 18 and 20, together with the sealing gasket 8 preventpassage of any fluid from the inlet side to the chamby any suitable means, a connection will be esfluid will pass from. the chamber M to the outlet faster than it can be replenished through this passage 2|, and, therefore, the'pressure on the chamber 2| will be considerably less than the pressure on the inner side of the valve.

This pressure differential forces the valve l9 away from its seats l2 and ii. In Figure 1, the

valve is shown in its open position and fluid is free to flow from the inlet, passage I through the ports H to the cylindrical chamber 9 and thus to the outlet.

From the above, it will be notedthat the gaskets associated with the valve only function when the valve is in closed position, and they do not in any way interfere with the free movement of the valve in ,the valve chamber. It will also be noted that when the valve is in closed position that the gaskets contacting with the valve seats at opposite sides of the channel IE will prevent any leakage of fluid from the inlet passage 1 directly to the ports II, or through the passage 2!, the outer chamber I4, and around the valve to the ports H.

I It is obvious that many changes in the details of construction and the arrangement of parts may be made without departing from the spirit of the invention as set forth in the appended claims.

What is claimed is:

1. A-valve comprising a casing, an adapter having a. sealed connection with said casing adjacent one end thereof, and a sealed connection with said casing at a point spaced inwardly therefrom, said adapter being spaced away from said casing intermediate said sealed connections to provide a fluid chamber surrounding the adapter, said casing having a fluid passage in the side wall thereof connected with said chamber, said adapter having spaced annular valve seats at its inner end disconnections to provide a fluid chamber surroundtablished in the chamber M with the outlet 7 ing the adapter, said casing having a fluid passage in the side wall thereof connected with said chamber, said adapter having spaced. annular valveseatsat its inner end disposed in the same plane, ports in the adapter disposed between said seats for connecting said fluid chamber to the fluid passage in said adapter, a valve adapted to engage said seats for closing the ports, and means whereby said valveis moved towardand from said seats by a differential in they fluid pressures operating upon opposite sides of said valve.

3. A valve comprising a casing, an adapter having a sealed connectionwith said casing adjacent one end thereof, and alsealedconnection with said casing at a point spaced inwardly therefrom, said adapter being spaced away from said casing intermediate said 's'e'aled' connections to provide a fluid chamber surroundihg'the adapter, 'said casing having a fluid passagein theside wall thereof connected with said chamber, said adapter having spaced annularvalve seats at its inner end disposed in the same plane, ports in the adapter disposed between said seats for connecting said fluid chamber to the fluid passage in said adapter, a valve adapted to engage said seats for closing the ports, means whereby said valve is moved toward and from said seats by a differential in the fluid pressures operating upon opposite sides of said valve, and a pilot valve for controlling the diiferential in the pressure bearing on opposite sides of said valve.

4. A valve comprising a casing, an adapter having a sealed connection with said casing adjacent one end thereof, and a sealed connection with said casing at a point spaced inwardly therefrom, said adapter being spaced away from said casing intermediate said sealed connections to provide a fluid chamber surrounding the adapter, said casing having a fluid passage in the side wall thereof connected with said chamber, said adapter having spaced annular valve seats at its inner end disposed in the same plane, ports in the adapter disposed between said seats for connecting said fluid chamber to the fluid passage in said adapter, and a valve adapted to engage said seats for closing the ports, said iii from the opposite end of said casing to provide a chamber for a valve, means for closing said opposite end of the casing, a valve disposed in said valve. chamber and movable toward and from the valve seats by a differential in fluid pressures on the opposite sides of said valve, said valve having a relatively small passage centrally therethrough for connecting the chambers at the inner and outer sides of said valve, and a pilot valve for controlling .a passage connecting the chamber at the outer side of said valve with the chamber surrounding the adapter.

'7. A valve comprising a casing, an adapter having a sealed connection with said casing adjacent one end thereof, and a sealed connection with said casing at a point spaced inwardly therefrom, said adapter being spaced away from said casing intermediate said sealed connections to provide a fluid chamber surrounding the adapter, said casing having a fluid passage in p the side wall thereof connected with said chamvalve being provided with spaced ring gaskets adapted to engage the valve seats.

5. A valve comprising a casing, an adapter having a sealed connection with said casing adjacent one end thereof, and a sealed connection with said casing at a point spaced inwardly therefrom, said adapter being spaced away from said casing intermediate said sealed connections to provide a fluid chamber surrounding the adapter, said casing having a fluid passage in the side wall thereof connected with said chamber, said adapter having spaced annular valve seats at its inner end disposed in the same plane, ports in the adapter disposed between said seats for connecting said fluid chamber to the fluid passage in said adapter, said adapter being spaced from the opposite end of said casing to provide a chamber for a valve, means for closing said opposite end of the casing, a valve disposed in said valve chamber and movable toward and from the valve seats by a diiferential in fluid to provide a fluid chamber surrounding the adapter, said casing havinga fluid passage in the side wall thereof connected with said chamber, said adapter having spaced annular valve seats at its inner end disposed in the same plane, ports inthe adapter disposed between said seats for connecting said fluid chamber to the fluid passage in said adapter, said adapter being spaced her, said adapter having spaced annular valve seats at its inner end disposed in the same plane, ports in the adapter disposed between said seats for connecting said fluid chamber to the fluid passage in said adapter, said adapter being spaced from the outer end of said casing to form a valve chamber, a valve having free sliding movement in said chamber, a spring for moving said valve toward closed position, said valve having a passage ,centrally therethrough connecting the passage in the adapter to the valve chamber at the outer side of the valve, said valve having spaced annular recesses on the inner face thereof, gaskets disposed in said recesses and projecting therefrom and adapted to engage the' REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number 'Name Date 1,005,703 Goeddel Oct. 10, 1911 1,035,898 Pasman Aug. 20, 1912 789,561 Pasman' .May 9, 1905 696,135 Curtis Mar. 25, 1902 

